Prowla Trace Crimps are soft, black coated, and at 12mm long give a perfect strong and neat finish to any wire trace. They have a large enough bore to allow wire to be passed through three times, and will fit either 7 or 49 strand wire between 20lb and 50lb breaking strains. Use with the Prowla Crimping Pliers, which has an 8mm head, to ensure an ultra-strong and fish safe trace.